Home / 15,705.39-21,668.56-8,989.77

Finding the Fourth Proportional to 15,705.39, 21,668.56 and 8,989.77

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Solution

The fourth proportional to 15,705.39, 21,668.56 and 8,989.77 is: 12,403.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,705.39 : 21,668.56 = 8,989.77 : x
  2. Step 2: Convert to fraction form
    15,705.39/21,668.56 = 8,989.77/x
  3. Step 3: Cross multiply
    15,705.39x = 21,668.56 × 8,989.77
  4. Step 4: Simplify right side
    15,705.39x = 194,795,255.50
  5. Step 5: Solve for x
    x = 194,795,255.50/15,705.39
  6. Step 6: Final answer
    x = 12,403.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.